/**
 * Copyright (C) 2008 aileron.cc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package cc.aileron.commons.magic;

import java.util.List;

import cc.aileron.commons.exception.ModuleConfigurationException;
import cc.aileron.commons.utility.ClassPattrnFinderUtils;

import com.google.inject.Binder;
import com.google.inject.Inject;

/**
 * magicMethodBinder
 * @author Aileron
 *
 */
public class MagicMethodBinderImpl implements MagicMethodBinder 
{
	/**
	 * class リスト
	 */
	private final List<Class<?>> classList;
	
	/**
	 * facotry
	 */
	private final MagicMethodClassCompiler compiler ;
	
	/**
	 * magic-method
	 */
	private final MagicMethod command;
	
	/**
	 * コンストラクタ
	 * @param targetPackage
	 * @param classNamePattern
	 */
	@Inject
	public MagicMethodBinderImpl(
		final MagicMethodBindSetting parameter,
		final MagicMethodClassCompiler compiler,
		final MagicMethod command)
	throws ModuleConfigurationException
	{
	    try
	    {
	        this.classList = ClassPattrnFinderUtils.
			    getClassNameList(parameter.getTargetPackage(), parameter.getClassNamePattern());
	    }
	    catch(Exception e)
	    {
	        throw new ModuleConfigurationException(e);
	    }
		this.command = command;
		this.compiler = compiler;
	}
	
	
	private void bindImplementInstance(
		final Binder binder,
		final Class<Object> interfaceClass)
	{
	    try
	    {
			final Object object = compiler.createImplementInstance(command,interfaceClass);
			binder.bind(interfaceClass).toInstance(object);
	    }
	    catch(Exception e)
	    {
	        throw new RuntimeException(e);
	    }
	}

	/*
	 * (非 Javadoc)
	 * @see com.google.inject.Module#configure(com.google.inject.Binder)
	 */
	public void configure(final Binder binder) 
	{
		for( Class<?> interfaceClass : classList )
		{
		    final Class<Object> c = convertClass(interfaceClass);
			bindImplementInstance(binder,c);
		}
	}
	
	@SuppressWarnings("unchecked")
    private Class<Object> convertClass(Class<?> classObject)
	{
	    return (Class<Object>) classObject;
	}
}
